Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e8cf1df1fd5bd48…

MALICIOUS

PDF

43.6 KB Created: 2021-06-11 09:35:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 52921713306737edd1da790dbb91348f SHA-1: d8b73cc55171dabd7aec0b380bd3e263d7613c7c SHA-256: 2e8cf1df1fd5bd48bc2963b674591618da23ff82e3e6d1516f86ee44cd7d8bbc
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous external links, many of which point to suspicious domains and appear to be part of a link farm. The document body, though partially corrupted, suggests a lure related to game hacking, likely intended to trick users into downloading further malicious content. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.tw/app/431946152/how-to-hack-roblox-pet-traininer-game-hack
    • http://gruporamos.do/images/robux-pastebin-hack-2021_GM431946152.pdf
    • http://gruporamos.do/images/how-is-tiktok-free_GM835599320.pdf
    • http://gruporamos.do/images/free-tiktok-followers-no-human-verification_GM835599320.pdf
    • http://gruporamos.do/images/free-robux-without-human-verification-or-survey-2021_GM431946152.pdf
    • http://gruporamos.do/images/best-ways-to-make-robux-in-roblox-for-free_GM431946152.pdf
    • http://gruporamos.do/images/best-free-hacked-client_GM479516143.pdf
    • http://gruporamos.do/images/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdf
    • http://gruporamos.do/images/free-unlimited-coin-master-400-spin-link_GM406889139.pdf
    • http://gruporamos.do/images/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • http://gruporamos.do/images/coin-master-free-spins-coins_GM406889139.pdf
    • http://gruporamos.do/images/free-minecraft-bedrock-server-hosting_GM479516143.pdf
    • http://gruporamos.do/images/hack-roblox-online_GM431946152.pdf
    • http://gruporamos.do/images/cruise-ship-tycoon-hack-roblox_GM431946152.pdf
    • http://gruporamos.do/images/minecraft-jar-free_GM479516143.pdf
    • http://gruporamos.do/images/coin-master-free-spins-fb-champion_GM406889139.pdf
    • http://gruporamos.do/images/hack-robux-for-roblox_GM431946152.pdf
    • http://gruporamos.do/images/can-i-get-robux-for-free_GM431946152.pdf
    • http://gruporamos.do/images/how-do-u-hack-roblox_GM431946152.pdf
    • http://gruporamos.do/images/websites-to-get-free-robux_GM431946152.pdf
    • http://gruporamos.do/images/roblox-how-to-get-hacks_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f50.bin
37d37169b08abf5f92fa80dce6733b10d7e0a7732e5afa531776ab1a9f0378bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F50 24036 bytes
font_01_sfnt_off0000864a.bin
a19db58c8f9e3f5c5ef93dff12d71a8c3d9c5335c0d1abbde62fa575a03e6d23
pdf-font-stream PDF embedded font (sfnt) at offset 0x864A 18724 bytes